Thermostat controlled means for maintaining dual temperature in motors



May 1949- J. z. BRUBAKER 2,468,735

THERMOSTAT CONTROLLED MEANS FOR MAINTAINING DUAL TEMPERATURE IN MOTORS 2Sheets-Sheet 1 Filed Aug. 18, 1945 y 1949- z BRUBAKER 2,468,735

J. THERMOSTAT CONTROLLED MEANS FOR MAINTAINING DUAL TEMPERATURE INMOTORS Filed Aug. 18, 1945 2 Sheets-Sheet 2 INVENTOR. Jiqcaa Z.BRUBA/(ER max NE).

Patented May 3, 1949 THERMOSTAT CONTROLLED MEANS FOR MAINTAINING DUALTEMPERATURE IN MOTORS Jacob Z. Brubaker, Manheim, Pa. Application August18, 1945, Serial No. 611,302 4 Claims. (01. 123-178) 1 This applicationis an improvement upon the invention described in my Patents 1,789,540,1,962,134, 1,985,420 and 2,069,749.

The object of my invention is to provide, an improvement over my priorcooling systems for maintaining the heat of the head at a highertemperature than in the block of the motor. To improve combustion andmaintain proper lubrication, whether the automobile is driven at low orhigh speed; and to provide novel means for facilitating the starting ofthe engine in cold weather; and to provide novel means for use inemergency, such as when there is a leaky radiator, and for maintainingthe proper operation of the motor. I attain these and other objects ofmy invention by the apparatus illustrated in the accompanying drawing,in which is shown a side elevation of my invention with a portion of thethermostat casing and the by-pass pipe leading into said casing shown insection in order to illustrate the thermostat.

Fig. 1 is a side elevation of the invention, a portion of the thermostatcasing being broken away and shown in section, and a portion of thethermostatic valve mechanism also being shown in section, and

Fig. 2 is a side elevation of to a motor.

Fig. 3 is a vertical section through the thermostatic valve casingshowing a modification of the valve.

Like numerals designate like parts in each of the views.

Referring to the accompanying drawings, I provide a cylinder block I,having the usual cylinder jacket 2, and a cylinder head 3. Opening outof the cylinder head 3, I provide a thermostat casing and conduit 4. Thethermostat casing 4' is connected to a rubber coupling 5, which, inturn, is connected with the conduit I which opens into the upper end ofthe radiator 8.

An outlet 6 at the rear of the cylinder jacket -2, opens into theby-pass 6, which extends up over the cylinder head 3 and into thethermostat casing 4. Opening 9 of by-pass 6 provides a seat for valve 8.Valve 8 is operated by the thermostat bellows I 0. When the ball valve 8is in lowered position, it seats on the valve seat I3 of extension I2 ofby-pass 6. When the ball valve 8 is removed for summer driving or whenball is lifted out of seat, the fluid of by-pass hits extension hollowtubing II of thermostat I0, thereby retarding the action of thethermostat, thus cooling the fluid in the exposed or extended tube 24.The extension tube 24 also contacts ball 8 to raise the inventionapplied it 01! its seat, and the cold water hits that hollow extension01. thermostat stem which retards the action of the thermostat. Valve 8is actuated by plunger I I and bellows seat either on valve seat I3, orover opemng 9. The thermostat plunger II is guided by the guide elementI4 and that element is supported in position by the ring I 5. Ring IS inturn is secured between the two sections of the thermostat casing 4, asshown in Fig. 1.

A conduit I6 opens out of the lower end of the radiator 25 and isconnected by rubber coupling I! with the conduit 20, opening into thepump casing 22 by which water is forced through the water Jacket 2, asindicated by the arrows. Some of the water passes through the aperture2| in the gasket 23, and into the cylinderhead 3. -At the same time someof the water passes through the outlet to into through the by-pass 6 tothe thermostat casing 4, as shown in Fig. 1 or the drawings and thencethrough conduits 5 and l to the upper end 01' the radiator 8.

As shown in Fig. 2 of the drawing, I provide a suitable manuallyoperated valve 24 in the lower end of the by-pass 8 by which thecirculation or the water through that by-pass may be stopped whendesired, to meet emergency conditions.

As shown in Fig. I in lieu of the manually operated valve 24 I maydepend on the thermostat valve 8 for the automatic regulation of thecirculation of water through by-pass 8.

In operation the water circulates as indicated by the arrows beingpumped by the pump in casing 22 through the water jacket 2. some of thewater passing through the apertures 2| in the gasket 23 into thecylinder head 3. and some of the water passing through the outlet Gointo the by-pass 6. From cylinder head 3 the water passes through thethermostat valve casing 4, coupling 5 and conduit 1, into the inletreservoir of the radiator. From thence it flows downward into the bottomof the radiator and through conduit I6, coupling I9 and conduit 20, tothe pump casing 22 to complete the operation.

The water flowing through by-pass 6 completes the circulation of coolerwater through the cylinder block, and when it flows into the streamflowing through conduit 1, it is relatively cooler and tends to reducethe temperature of the water or liquid circulating through the motor.

At the outset thermostat l0. closes the flow of water from by-pass 6into casing 4 and to conduit 5 until the desired temperature is reached,when it will open that conduit and permit some of the water to flowdirectly through that conduit while III which cause the valve to aportion oi the water continues to flow through by-pass Q.

When an automobile is driven at a speed or 45 miles an hour, or less,the temperature of the water in the cylinder head I will beapproximately 180 degrees Fahrenheit, while the temperature of the waterinthe water jacket 2 oi the cylinder block will be approximately 100degrees Fahrenheit. It the automobile is traveling at a high speed 01say, 60 miles an hour, or over, the temperature oi. the water in thecylinder head 3 will drop to approximately 160 degrees Fahrenheit, andthe temperature of the water in the water jacket 2 0! the block willrise to approximately 120 degrees Fahrenheit. In a case of emergency,where it is necessary to run at low gear, as in traveling through mud,or sand, or snow, or in case of a leaky radiator when the water is low,ator closes the manually operated valve 24 part way or altogether, tobring about the conventional water circulation.

the oper- -ket to the radiator.

\ subject to.control o! the thermostatic valve, a

As shown in Fig. 1 circulation of water through the by-pass s isthermostatically controlled by the starting the motor when the x wateris at a low temperature, the valve 0 would thermostat 8. In

be in closed position, while the engine is being warmed up. As thetemperature rises, at the predetermined temperature at which thethermostat is set, the valve 8 will open and allow the circulation ofwater through the by-pass in the manner heretofore described.

What I claim is:

1. In a thermostatically controlled automatic dual temperature systemengines, the combination of a cylinder head block having a water jacket,a cylinder head having a water jacket in communication with the saidcylinder block water jacket, a radiator, a conduit extending from thecylinder head water jacket to the radiator and having a thermostaticvalve therein, a continuously open conduit through which water from thewater jacket of the cylinder block may flow into the conduit which leadsfrom the cylinder head to the radiator, but subject to the control ofthe thermostatic valve, a conduit from the radiator to the adjacent endof the water jacket of the cylinder block, a continuous open conduitfrom the water jacket of the cylinder block communicating with thethermostat whereby the action of the thermostat controls and stops thenow of cooling liquid in said conduit.

2. In a thermostatically controlled automatic dual temperature systemfor internal combustion engines, the combination of a cylinder blockhaving a water jacket, a cylinder head having a waior internalcombustion conduiti-rom the radiator to the adjacent end oi the waterjacket oi the cylinder block, a conduit leading from the water jacket ofthe cylinder block. having an extension provided with a valve seat, avalve adapted to seat over the end 01' the conduit and on the valveseat, and means thermostatically controlling the operation of saidvalve. 8

3. In combination with the mechanism deiined in claim 2, a conduitleading from the water jacket of the cylinder block, having a manuallyoperated valve, which can be partly oraltogether closed to bring aboutthe conventional circulation when emergency conditions prevail.

4. In a thermostatically controlled automatic dual temperature systemfor internal combustion engines, the combination of a cylinder blockhaving a water jacket, a cylinder head having a water jacket incommunication with the said cylinder block water jacket, a radiator, aconduit extending from thecylinder head water jacket to the radiator andhaving a thermostatic valve therein, a conduit through which water fromthe water jacket oi the cylinder block may flow into the conduit whichleads from the cylinder head to the radiator, but subject to the controlof the thermostatic valve, a conduit from the radiator to the adjacentend of the water jacket of the cylinder block, a conduit from the waterjacket of the cylinder block communicating with the thermostat wherebyaction of the thermostat controls the flow of cooling liquid in saidcombination, the thermostat having an extended tube, and a valve incommunication with the extended tube of the thermostat.

JACOB Z. BRUBAKER.

REFERENCES crrnn The following references are of record in the tile ofthis patent:

rmrrnn STATES PATENTS 421,455 Great Britain 41934

